jQuery.cookie = function(name, value, options) {
	if (typeof value != 'undefined') { // name and value given, set cookie
		options = options || {};
		if (value === null) {
			value = '';
			options.expires = -1;
		}
		var expires = '';
		if (options.expires
				&& (typeof options.expires == 'number' || options.expires.toUTCString)) {
			var date;
			if (typeof options.expires == 'number') {
				date = new Date();
				date.setTime(date.getTime()
						+ (options.expires * 24 * 60 * 60 * 1000));
			} else {
				date = options.expires;
			}
			expires = '; expires=' + date.toUTCString(); // use expires // attribute,// max-age is not // supported by IE
		}
		var path = options.path ? '; path=' + options.path : '';
		var domain = options.domain ? '; domain=' + options.domain : '';
		var secure = options.secure ? '; secure' : '';
		document.cookie = [ name, '=', encodeURIComponent(value), expires,
				path, domain, secure ].join('');
	} else { // only name given, get cookie
		var cookieValue = null;
		if (document.cookie && document.cookie != '') {
			var cookies = document.cookie.split(';');
			for ( var i = 0; i < cookies.length; i++) {
				var cookie = jQuery.trim(cookies[i]);
				// Does this cookie string begin with the name we want?
				if (cookie.substring(0, name.length + 1) == (name + '=')) {
					cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
					break;
				}
			}
		}
		return cookieValue;
	}
};
function getcookie(name) {
	var cookie_start = document.cookie.indexOf(name);
	var cookie_end = document.cookie.indexOf(";", cookie_start);
	return cookie_start == -1 ? '' : unescape(document.cookie.substring(
			cookie_start + name.length + 1,
			(cookie_end > cookie_start ? cookie_end : document.cookie.length)));
}

function setcookie(cookieName, cookieValue, seconds, path, domain, secure) {
	var expires = new Date();
	expires.setTime(expires.getTime() + seconds);
	document.cookie = escape(cookieName) + '=' + escape(cookieValue)
			+ (expires ? '; expires=' + expires.toGMTString() : '')
			+ (path ? '; path=' + path : '/')
			+ (domain ? '; domain=' + domain : '') + (secure ? '; secure' : '');
}

//提供方便方法操作cookie :
//	$.cookie('the_cookie'); // 获得cookie
//	$.cookie('the_cookie', 'the_value'); // 设置cookie
//	$.cookie('the_cookie', 'the_value', { expires: 7 }); //设置带时间的cookie  7天
//	$.cookie('the_cookie', '', { expires: -1 }); // 删除
//	$.cookie('the_cookie', null); // 删除 cookie
//
//	设置cookie的名值对，有效期，路径，域，安全
//	$.cookie(’name’, ‘value’, {expires: 7, path: ‘/’, domain: ‘jquery.com’, secure: true});
